It doesn't. That is the point. It is an umbrella organisation encompassing the many diverse styles of many different shihans including Yamaguchi-sensei, Saito-sensei, Nishio-sensei, Kisshomaru-doshu etc. Each of these senseis can be as different from each other as as 2 sensei's from different organisations.

I agree with Alex about Maruyama sensei by the way. I found him to be very impressive.